Journal
BRITISH JOURNAL OF SPORTS MEDICINE
Volume -, Issue -, Pages -Publisher
BMJ PUBLISHING GROUP
DOI: 10.1136/bjsports-2022-105754
Keywords
Tendinopathy; Exercise Therapy; Systematic review
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This systematic review and meta-analysis investigated the moderating effects of resistance exercise dose components including intensity, volume and frequency for the management of common tendinopathies. The results indicated that higher intensity therapies and lower frequency therapies have better efficacy in tendinopathy management, while the association between training volume and effect sizes was minimal and inconsistent.
ObjectiveTo investigate potential moderating effects of resistance exercise dose components including intensity, volume and frequency, for the management of common tendinopathies. DesignSystematic review with meta-analysis and meta-regressions. Data sourcesIncluding but not limited to: MEDLINE, CINAHL, SPORTDiscus, ClinicalTrials.gov and ISRCTN Registry. Eligibility criteria for selecting studiesRandomised and non-randomised controlled trials investigating resistance exercise as the dominant treatment class, reporting sufficient information regarding >= 2 components of exercise dose. ResultsA total of 110 studies were included in meta-analyses (148 treatment arms (TAs), 3953 participants), reporting on five tendinopathy locations (rotator cuff: 48 TAs; Achilles: 43 TAs; lateral elbow: 29 TAs; patellar: 24 TAs; gluteal: 4 TAs). Meta-regressions provided consistent evidence of greater pooled mean effect sizes for higher intensity therapies comprising additional external resistance compared with body mass only (large effect size domains: beta(BodyMass: External) = 0.50 (95% credible interval (CrI): 0.15 to 0.84; p=0.998); small effect size domains (beta(BodyMass: External) = 0.04 (95% CrI: -0.21 to 0.31; p=0.619)) when combined across tendinopathy locations or analysed separately. Greater pooled mean effect sizes were also identified for the lowest frequency (less than daily) compared with mid (daily) and high frequencies (more than once per day) for both effect size domains when combined or analysed separately (p >= 0.976). Evidence for associations between training volume and pooled mean effect sizes was minimal and inconsistent. Summary/conclusionResistance exercise dose is poorly reported within tendinopathy management literature. However, this large meta-analysis identified some consistent patterns indicating greater efficacy on average with therapies prescribing higher intensities (through inclusion of additional loads) and lower frequencies, potentially creating stronger stimuli and facilitating adequate recovery.
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